Narcolepsy is a condition that causes a person to fall asleep at unexpected times. While in deep sleep, a person may continue to do voluntary movements but are not aware of it. Upon awaking from sleep, the person is often confused and/or dizzy and has to take a few minutes to come back to their senses. Narcolepsy is often impacted by high levels of thinking, processing, stress, or emotion.
I think you're looking for the name for this event? This is eclipse, and more specifically solar eclipse: when the Sun cannot be seen because it is covered by the moon between the Sun and Earth
